I want to run my P250 (full size - 9mm)with a suppressor and optics, but I seem to be having trouble with both.

1. Can't find a threaded barrel. The Sig site only seems to offer them for the compact and subcompact (??). Anyone know where a full-size tb can be found?

2. Can't find a good solution to mount a red dot. I've used the Sight Mount rear sight/rail on other guns, but the 250's proprietary rear makes that a no go. Anyone found anything besides having the slide milled to accept a specific optic (and then getting locked in) - though if you did go that route, where did you get it done.

Thanks